Aśauca-vidhi (Rules of Impurity) within Śrāddha-kalpa — Chapter on Testing/Selecting Brahmanas and Honoring the Atithi
न मीमांस्याः सदा विप्राः पवित्रंह्येतदुत्तमम् / दैवे पित्र्ये च नियतं श्रूयते वै परीक्षणम्
na mīmāṃsyāḥ sadā viprāḥ pavitraṃhyetaduttamam / daive pitrye ca niyataṃ śrūyate vai parīkṣaṇam
O vipras, do not ever be lost in mīmāṃsā disputation; this is the highest and most purifying rule. In offerings to the gods and to the Fathers, examination is indeed heard of as obligatory.